Add execution metadata to module specifications

internal/modules/dnd/normalize/spells/normalizer.go

@@ -297,6 +297,7 @@ func ModuleSpec() pipeline.ModuleSpec {
 	return pipeline.ModuleSpec{
 		Key:            Key,
 		Stage:          pipeline.StageNormalize,
+		ExecutionClass: contracts.ExecutionClassDeterministic,
 		Requires:       append([]string(nil), requiredCapabilities...),
 		Provides:       append([]string(nil), providedCapabilities...),
 		ArtifactKind:   dnd.SpellListKind,

internal/modules/dnd/normalize/spells/normalizer_test.go

@@ -24,11 +24,12 @@ func TestModuleContractAndStrictOptions(t *testing.T) {
 	}
 
 	want := pipeline.ModuleSpec{
-		Key:          Key,
-		Stage:        pipeline.StageNormalize,
-		Requires:     []string{"merged"},
-		Provides:     []string{"normalized"},
-		ArtifactKind: dnd.SpellListKind,
+		Key:            Key,
+		Stage:          pipeline.StageNormalize,
+		ExecutionClass: contracts.ExecutionClassDeterministic,
+		Requires:       []string{"merged"},
+		Provides:       []string{"normalized"},
+		ArtifactKind:   dnd.SpellListKind,
 		ReferenceSlots: []contracts.ReferenceSlot{{
 			Name:               spellcatalog.SpellCatalogReferenceSlot,
 			Description:        "Optional canonical spell-name catalog used for normalization and duplicate identity.",